Steam ejector



Dec. 19, 1939. E. G. ROSS 2,133,623

STEAM EJECTOR Filed Aug. 20, 1938 2 Sheets-Sheet 1 ELMER G- Russ lVENTOR ATTORNEY 2 Sheets-Sheet 2 ELMEQ Q R058 ATTORNEY Dec. 19 1939. E.G. ROSS I STEAM EJECTOR Filed Aug. 20, 1958 R 5 m a w 0 l I. 7. 2 w 4 1fl I 6 2 4 2 1i 9 W 3 \\\\\X\\\\\ m TLI ii I 1 I 2 5 l 3 2 5 E .i

Patented Dec. 19, 1939 UNITED STATES PATENT OFFICE STEAlVI EJECTOR wareApplication August 20, 1938, Serial No. 225,878

4 Claims.

This invention relates to steam ejectors or steam jet exhausters, and anobject of the present invention is to provide a steam jet exhausterwhich will withstand the erosive action of wet steam and the corrosiveaction of acid and other chemical vapors and fluids.

Another object of the invention is to provide an ejector or steam jeteXhauster having a diffuser of vitreous material such as glass or thelike, and to provide a novel structure for mounting the vitreousdifiuser in its carrying body or shell so as to permit the difiuser tobe readily assembled or disassembled and connected to the nozzlecarrying head of the ejector as a complete unit.

Another object of the invention is to provide in a steam jet exhausteras specified a structure which will compensate for the difference in thecoeflicient of heat expansion of the vitreous diffuser and its metalshell.

With these and other objects in view, as may appear from theaccompanying specification, the invention consists of various featuresof construction and combination of parts, which will be first describedin connection with the accompanying drawings, showing a steam ejectorembodying the invention, and the features forming the invention will bespecifically pointed out in the claims.

In the drawings:

Figure l is a longitudinal section through the improved steam ejector.

Figure 2 is a cross-section taken on the line 2-2 of Figure 1.

Figure 3 is an end view of the discharge end of the ejector.

Figure 4 is a longitudinal section of a modified form of the diffuserstructure.

Figure 5 is a cross-section on the line 55 of Figure 4.

Referring more particularly to the drawings, the improved steam ejectoror steam jet eX- hauster comprises the inlet head I, which dischargesinto the diffuser 2, and through which the nozzle 3 projects. The nozzle3 discharges into the diffuser 2 at the inlet thereof as is usual in theconstruction of steam ejectors or exhausters.

The present invention relates wholly to the difiuser structure, and itincludes a metal shell 4 which has an annular flange 5 on its inlet endfor attachment to the outlet end of the head I. A vitreous diffuser B ispositioned within the shell 4 and forms the diifuser passage of theejector or exhauster. The glass difiuser 6 is securely held in placewithin the shell 4 by means of a holding sleeve '5 at its inlet end anda holding plate at its discharge end. The holding sleeve 3 is providedwith an inturned flange 9 which engages a gasket ill placed over theinlet end of the vitreous diffuser 6. The sleeve I has an out-turnedannular flange ll formed thereon which rests in a recess 52 in the faceof the flange The flange H is attached to the flange E by cap screws M,so that the tightening of the cap screws 54 in place will urge theinturned flange 9 towards the end of the diffuser 6.

The outlet end of the shell 4 has a recess 15 cut therein which receivesthe holding plate 8. A gasket It engages the holding plate 8 and thedischarge end of the diffuser 6, so that when the plate 8 is securelyattached to the shell 4 by means of the cap screws I! the diffuser 6will be tightly clamped in position in the shell 4 forming a completeunitary diffuser structure which is attached to the head I by means ofsuitable bolts (not shown).

The gaskets I0 and I6 are of yieldable material and of sufficientthickness to compensate for the difference in the coeflicient of heatexpansion of the vitreous dilfuser 6 and the metal shell 4.

In Figures 4 and 5 of the drawings a modified form of the diffuserstructure is shown which difiers only slightly from the preferred formillustrated in Figure 1. In this modified construction the diffuserstructure 2 includes the metal shell 4' having the flange 5 at its inletend, which flange serves as means of attachment of the diffuser to thehead I. The vitreous diifuser 6 has its inlet end engaged by a holdingsleeve 7'. The holding sleeve 1 has an inturned annular flange 9 whichengages the gasket l0 over the inlet end of the diffuser 6'. The flangeH of the holding sleeve 1 fits in a recess l2 in the face of the flange5. However, it is not attached to the shell 4 by means of cap screws orthe like, as is the sleeve 1 in Figures 1 to 3.

A holding plate 29 is provided, which is attached to the annularattaching flange 2! on the outlet end of the shell 4. The plate 20 is ofthe same diameter as the flange 2i, and a gasket 22 is placed betweenthe holding plate 20 and the flange 2!, and it has an inturned annularportion 23 which engages about the outer surface of the diffuser B atits outlet end. When the holding plate 2! is securely clamped in placeor securely connected to the flange 2|, it forces the inlet end of thediffuser 6 firmly against the gasket I0 and the inturned flange 9'. Suchforcing action also forces the flange ll securely against the gasket 2and the attaching flange 25 of the head i, thus securely holding thevitreous diffuser 6' in its proper position in the shell 4 and providinga complete unitary diffuser structure which may be attached to ordetached from the head I as a unit.

It will be understood that the invention is not to be limited to thespecific construction or arrangement of parts shown but that they may bewidely modified within the invention defined by the claims.

What is claimed is:

1. In a steam jet exhauster, a metal diffuser shell, a head, a vitreousdiffuser in said shell and being entirely free from any direct contactwith the shell, and clamping means carried by said shell and engagingsaid diffuser for holding it in place in the shell.

2. In a steam jet exhauster, a metal diffuser shell, a head, a vitreousdifiuser in said shell and being entirely free from any directconnection with the shell, clamping rings carried by said shell andengaging said diffuser for holding it in place in the shell, andyieldable gaskets be- 3. In a steam jet exhauster, a metal difiusershell, 2. head, a vitreous diffuser in said shell and being entirelyfree from any direct connection with the shell, a clamping ring havingan out-turned flange detachably connected to the shell and an inturnedflange engaging the inlet end of said vitreous difiuser, and a clampingplate detachably carried by said shell and engaging the outlet end ofthe vitreous difiuser whereby said diffuser will be held in place withinsaid shell by said clamping rings without contact with the shell.

4. In a steam jet exhauster, a metal diffuser shell, a head, a vitreousdiffuser in said shell and projecting upwardly into said head, saidshell provided with an annular groove at its end connected to said head,a holding sleeve at the inlet end of the vitreous diffuser and having anout-turned flange engaging in the roove in said shell, said holdingsleeve having an inturned flange at its end remote from said outturnedflange and a yieldable gasket between said in-turned flange and theinlet end of said vitreous diffuser for yieldably holding the diffuserin place, and means attached to said shell and engaging the outlet endof the vitreous difiuser.

ELMER, G. ROSS.

